In ye olde navigation days, they rather cleverly with the help of copius books of tables, a sextant, a chronograph, clear skies, a metric crapload of skill & a little good luck they could fix their position reasonably well.

So the Christian Right reaches them through invoking God's name filtered through an idiosyncatic interpretation of sacred text in the Bible, while supplying them with copius pseudo-scientific "studies" proving abortion, homosexuality, and other liberal secular humanist moral outrages are dangerous to society, especially children.